I'm using BL-USBMach3 board for my 7x12 mini lathe, setting Pin 15 as index input, following same rule as Parallel breakout board.
but got random Spindle RPM value from 10-1000 RPM.
I have no problem with LPT breakout board.
Anyone have success with the BL-USBMach3 board to process Index input?
Thanks